package Demo_201;

/**
 * 创建两个线程，利用多线程完成100000累加操作
 * 同一线程对象   修改  同一共享变量
 * 用synchronized关键字修饰方法
 */
public class Demo_01 {
    public static void main(String[] args) throws InterruptedException {
        Count count = new Count();
        Thread th1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                count.increase();
            }
        });
        Thread th2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                count.increase();
            }
        });
        //启动线程
        th1.start();
        th2.start();
        //等待线程执行完毕
        th1.join();
        th2.join();
        //打印结果，预期结果为：100000
        System.out.println(count.count);
    }
}
class Count {
    int count = 0;
    public synchronized void increase() {
        count++;
    }
}
